Televue的Starbeam
Televue的Starbeam 这是什么? :oops: 是广角人造卫星观测仪吧,青岛天文协会有5台类似的东西,大广角,看卫星超级爽RE
如果是人造卫星观测广角仪的话,那面反光镜对准要观测的天区,星光发射到镜上再反射到物镜和目镜中这是0神五发射时,青岛台做陨落段拦截观测时的现场,台湾的林启生先生正好防卫青岛,正在研究这玩意 怎么看？ 有目镜啊,老林不正看着呢嘛,这正是看天顶呢 红点瞄准镜嘛……
咋个又扯到人造卫星观测广角仪上去了呢？
光路图都已经说明了嘛！ 说明——
Starbeam's unique flip mirror feature provides comfort and flexibility for viewing at any angle from straight through to 90°. Viewed straight through, you see the natural sky with a 10 arc-minute (1/3 Moon diameter) "red-star" showing your scope's position. When your scope is pointed high, flip the mirror into position for more comfortable viewing. Viewed this way, the sky orientation matches a refractor or SCT's image. The size, color and adjustable brightness of the "red-star" makes it easy to see against any twilight to dark sky background.
With its 39mm aperture, the projected image is easily seen any distance behind Starbeam, whether 2 inches or 2 feet! The finely made glass lens acts as a beamsplitter to combine the natural sky background with the superimposed red pointing "star." The first lens surface acts as a collimating mirror so the "red-star" stays stationary against the sky background regardless of how it is viewed. It's 6-arc-minute accuracy over any eye position allows you to pin-point objects -- even with high-power eyepieces in the telescope. A compensating curve is designed into the second lens surface to provide the normal sky background view and is multi-coated to eliminate double images.
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